The head of Britain’s armed forces has warned that the world stands at the cusp of a “third nuclear age,’’ defined by multiple simultaneous challenges and weakened safeguards that kept previous threats in check.

The first phase of Ukraine's counteroffensive to recapture Russian-occupied territory after more than 16 months of war began weeks ago without fanfare.

More than 6,000 British military personnel will take part in the coronation of King Charles III, the U.K. forces’ biggest ceremonial deployment in seven decades.

The top commander of Ukraine’s military says his forces are pushing back against Russian troops in the long and grinding battle for the town of Bakhmut.